package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortPoint {
    public static void main(String[] args) {
        List<Point>list = new ArrayList<>();
        list.add(new Point(1,7));
        list.add(new Point(15,60));
        list.add(new Point(57,89));
        list.add(new Point(5,9));
        list.add(new Point(10,8));
        list.add(new Point(33,44));
        System.out.println(list);

        //jdk1.8时list集合自身提供了sort方法进行排序,方法中需要传入比较器
        list.sort(new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                return o1.getX()- o2.getX();
            }
        });
                System.out.println(list);

        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                int len1 = o1.getX()*o1.getX()+o1.getY()*o1.getY();
                int len2 = o2.getX()*o2.getX()+o2.getY()*o2.getY();
                return len1-len2;//升序
                //return len2-len1;//降序
                //return o1.getX()-o2.getX();//按x坐标升序
                //return o2.getY()-o1.getY();//按y坐标降序
            }
        });
        System.out.println(list);

        list.sort((o1, o2) -> {
            int len1 = o1.getX()*o1.getX()+o1.getY()*o1.getY();
            int len2 = o2.getX()*o2.getX()+o2.getY()*o2.getY();
            return len1-len2;//升序
        });
        System.out.println(list);

        //lambda表达式:
        Collections.sort(list,(o1,o2)->o1.getX()-o2.getX());
        System.out.println(list);

        list.sort((o1, o2) -> o1.getX()-o2.getX());
        System.out.println(list);







    }
}
